246 lines
8.8 KiB
Vue
246 lines
8.8 KiB
Vue
<!--
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DrCr: Web-based double-entry bookkeeping framework
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Copyright (C) 2022-2025 Lee Yingtong Li (RunasSudo)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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-->
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<template>
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<h1 class="page-heading mb-4">
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Multiple CGT adjustments
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</h1>
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<div class="grid grid-cols-[max-content_1fr] space-y-2 mb-4 items-baseline">
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<h2 class="col-span-2 text-xl text-gray-900 font-semibold">CGT assets</h2>
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<label for="account" class="block text-gray-900 pr-4">Account</label>
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<ComboBoxAccounts v-model="account" />
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<label for="commodity" class="block text-gray-900 pr-4">Commodity</label>
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<div>
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<input type="text" class="bordered-field" name="commodity" id="commodity" placeholder=" " v-model="commodity">
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</div>
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<div class="rounded-md bg-blue-50 p-4 col-span-2">
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<div class="flex">
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<div class="flex-shrink-0">
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<InformationCircleIcon class="w-5 h-5 text-blue-400" />
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</div>
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<div class="ml-3 flex-1">
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<p class="text-sm text-blue-700">The total cost adjustment will be distributed proportionally across all matching CGT assets.</p>
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</div>
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</div>
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</div>
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<h2 class="col-span-2 text-xl text-gray-900 font-semibold pt-4">CGT adjustment</h2>
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<label for="dt" class="block text-gray-900 pr-4">Adjustment date</label>
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<div>
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<input type="date" class="bordered-field" name="dt" id="dt" v-model="dt">
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</div>
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<label for="description" class="block text-gray-900 pr-4">Description</label>
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<div>
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<input type="text" class="bordered-field" name="description" id="description" placeholder=" " v-model="description">
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</div>
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<label for="cost_adjustment" class="block text-gray-900 pr-4">Total cost adjustment</label>
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<div class="relative shadow-sm">
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<div class="pointer-events-none absolute inset-y-0 left-0 flex items-center pl-3">
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<span class="text-gray-500">{{ db.metadata.reporting_commodity }}</span>
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</div>
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<input type="number" class="bordered-field pl-7 pr-16" step="0.01" v-model="cost_adjustment_abs" placeholder="0.00">
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<div class="absolute inset-y-0 right-0 flex items-center">
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<select class="h-full border-0 bg-transparent py-0 pl-2 pr-8 text-gray-900 focus:ring-2 focus:ring-inset focus:ring-indigo-600" v-model="sign">
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<option value="dr">Dr</option>
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<option value="cr">Cr</option>
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</select>
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</div>
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</div>
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</div>
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<div class="flex justify-end mt-4 space-x-2">
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<button class="btn-primary" @click="saveAdjustment">Save</button>
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</div>
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<div class="rounded-md bg-red-50 mt-4 p-4 col-span-2" v-if="error !== null">
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<div class="flex">
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<div class="flex-shrink-0">
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<XCircleIcon class="h-5 w-5 text-red-400" />
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</div>
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<div class="ml-3 flex-1">
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<p class="text-sm text-red-700">{{ error }}</p>
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</div>
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</div>
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</div>
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</template>
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<script setup lang="ts">
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import dayjs from 'dayjs';
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import { XCircleIcon } from '@heroicons/vue/24/solid';
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import { InformationCircleIcon } from '@heroicons/vue/20/solid';
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import { emit } from '@tauri-apps/api/event';
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import { getCurrentWindow } from '@tauri-apps/api/window';
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import { ref } from 'vue';
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import { CGTAsset } from './cgt.ts';
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import ComboBoxAccounts from '../../components/ComboBoxAccounts.vue';
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import { DT_FORMAT, DeserialiseAmountError, JoinedTransactionPosting, db, deserialiseAmount } from '../../db.ts';
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import { ppWithCommodity } from '../../display.ts';
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import { CriticalError } from '../../error.ts';
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const account = ref('');
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const commodity = ref('');
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const dt = ref(dayjs().format('YYYY-MM-DD'));
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const description = ref('');
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const cost_adjustment_abs = ref(null! as number);
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const sign = ref('dr');
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const error = ref(null as string | null);
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async function saveAdjustment() {
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// TODO: Preview mode?
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error.value = null;
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let totalAdjustmentAbs;
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try {
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totalAdjustmentAbs = deserialiseAmount('' + cost_adjustment_abs.value);
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} catch (err) {
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if (err instanceof DeserialiseAmountError) {
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error.value = err.message;
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return;
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} else {
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throw err;
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}
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}
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const totalAdjustment = sign.value === 'dr' ? totalAdjustmentAbs.quantity : -totalAdjustmentAbs.quantity;
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// Get all postings to the CGT asset account
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const session = await db.load();
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const cgtPostings = await session.select(
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`SELECT *
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FROM joined_transactions
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WHERE account = $1`,
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[account.value]
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) as JoinedTransactionPosting[];
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// Process postings to determine final balances
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// Based on cgt.ts getCGTAssets
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const assets: CGTAsset[] = [];
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for (const posting of cgtPostings) {
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// Check for matching asset
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if (posting.commodity.indexOf(' {') < 0) {
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if (posting.commodity !== commodity.value) {
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continue;
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}
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} else {
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const postingCommodityName = posting.commodity.substring(0, posting.commodity.indexOf(' {'));
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if (postingCommodityName !== commodity.value) {
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continue;
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}
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}
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// This is a matching CGT asset
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if (posting.quantity >= 0) {
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// Debit CGT asset - create new CGTAsset
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assets.push(new CGTAsset(posting.quantity, posting.commodity, posting.account, posting.dt))
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} else {
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// Credit CGT asset
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// Currently only a full disposal of a CGT asset is implemented
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// Find matching CGT asset
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const asset = assets.find((a) => a.commodity === posting.commodity && a.account === posting.account);
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if (!asset) {
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throw new Error('Attempted credit of ' + ppWithCommodity(posting.quantity, posting.commodity) + ' without preceding debit balance');
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}
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if (asset.quantity + posting.quantity < 0) {
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throw new Error('Attempted credit of ' + ppWithCommodity(posting.quantity, posting.commodity) + ' which exceeds debit balance of ' + ppWithCommodity(asset.quantity, asset.commodity));
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}
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if (asset.quantity + posting.quantity != 0) {
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throw new Error('Partial disposal of CGT asset not implemented');
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}
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assets.splice(assets.indexOf(asset), 1);
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}
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}
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if (assets.length === 0) {
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error.value = 'No matching CGT assets';
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return;
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}
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// Distribute total adjustment across matching assets
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const totalQuantity = assets.reduce((acc, asset) => acc + asset.quantity, 0)
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const cgtAdjustments = [];
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for (let i = 0; i < assets.length; i++) {
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// This might be fractional at this stage
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cgtAdjustments[i] = totalAdjustment * assets[i].quantity / totalQuantity;
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}
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// Compute the difference due to rounding
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const roundingShortfall = cgtAdjustments.reduce((acc, adj) => acc - Math.floor(Math.abs(adj)), Math.abs(totalAdjustment));
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// Sort by largest remainder
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const largestRemainders = cgtAdjustments.map((adj, i) => [Math.abs(adj) - Math.floor(Math.abs(adj)), i]);
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largestRemainders.sort((a, b) => b[0] - a[0]);
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// Round up as many as required to equal the total adjustment
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let i = 0;
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for (; i < roundingShortfall; i++) {
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const assetIndex = largestRemainders[i][1];
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const cgtAdjustment: number = cgtAdjustments[assetIndex];
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// Round away from zero
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const cgtAdjustmentAbs = Math.floor(Math.abs(cgtAdjustment)) + 1;
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cgtAdjustments[assetIndex] = cgtAdjustmentAbs * Math.sign(cgtAdjustment);
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}
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// Round others down
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for (; i < largestRemainders.length; i++) {
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const assetIndex = largestRemainders[i][1];
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const cgtAdjustment: number = cgtAdjustments[assetIndex];
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// Round towards zero
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const cgtAdjustmentAbs = Math.floor(Math.abs(cgtAdjustment));
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cgtAdjustments[assetIndex] = cgtAdjustmentAbs * Math.sign(cgtAdjustment);
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}
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// Sanity check
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const totalRoundedAdjustment = cgtAdjustments.reduce((acc, adj) => acc + adj, 0);
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if (totalRoundedAdjustment !== totalAdjustment) {
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throw new CriticalError('Rounding unexpectedly changed total CGT adjustment amount');
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}
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// Add adjustments to database atomically
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const dbTransaction = await session.begin();
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for (let i = 0; i < assets.length; i++) {
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const asset = assets[i];
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const cgtAdjustment = cgtAdjustments[i];
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await dbTransaction.execute(
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`INSERT INTO austax_cgt_cost_adjustments (quantity, commodity, account, acquisition_dt, dt, description, cost_adjustment)
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VALUES ($1, $2, $3, $4, $5, $6, $7)`,
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[asset.quantity, asset.commodity, asset.account, asset.acquisition_dt, dayjs(dt.value).format(DT_FORMAT), description.value, cgtAdjustment]
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);
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}
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await dbTransaction.commit();
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await emit('cgt-adjustment-updated');
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await getCurrentWindow().close();
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}
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</script>
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